# Errors and Status Codes

> Handle 400, 401, 404, 405 and 415 answers of the DocumentProcessing Web API: not registered, validation and token errors, and ServiceRequestException in .NET.

- **Product:** DS Server
- **Section:** Documentation
- **Kind:** Topic
- **Path:** DS Server > Document Processing > Errors and Status Codes
- **Web URL:** https://docs.textcontrol.com/ds-server/document-processing/errors/
- **LLMs URL:** https://docs.textcontrol.com/ds-server/document-processing/errors/llms.txt
- **LLMs-Full URL:** https://docs.textcontrol.com/ds-server/document-processing/errors/llms-full.txt

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## On This Page

- [Status Codes at a Glance](https://docs.textcontrol.com/ds-server/document-processing/errors/#status-codes-at-a-glance)
- [DS Server Is Not Registered](https://docs.textcontrol.com/ds-server/document-processing/errors/#ds-server-is-not-registered)
- [Validation Errors](https://docs.textcontrol.com/ds-server/document-processing/errors/#validation-errors)
- [Errors of the Endpoints](https://docs.textcontrol.com/ds-server/document-processing/errors/#errors-of-the-endpoints)
- [Access Token Errors](https://docs.textcontrol.com/ds-server/document-processing/errors/#access-token-errors)
- [Wrong Address, Method or Content Type](https://docs.textcontrol.com/ds-server/document-processing/errors/#wrong-address-method-or-content-type)
- [Handle Errors in .NET](https://docs.textcontrol.com/ds-server/document-processing/errors/#handle-errors-in-net)
- [Related Pages](https://docs.textcontrol.com/ds-server/document-processing/errors/#related-pages)

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## Nearby

- **Previous:** [Barcodes](https://docs.textcontrol.com/ds-server/document-processing/barcodes/llms.txt)
- **Next:** [Plugins](https://docs.textcontrol.com/ds-server/plugins/llms.txt)